iOS canOpenURL返回true，但未安装应用程序（facebook）

Question

Currently, I want to check in my app whether Facebook App is installed or not.

What am I doing:

UIApplication.shared.canOpenURL(URL(string: "fb://")!)enter code here

In URL Schemes I have added fb, so not missed that part too.

But canOpenURL RETURNS TRUE ! But the app IS UNinstalled. I restarted the device, not helped. Why this is happening? UPDATE: some code

if UIApplication.shared.canOpenURL(URL(string: "fb://")!) {
    self.shareToFacebook(with: completion)
} else {
    progressVC.dismiss(animated: false, completion: nil)
    UIApplication.shared.open(URL(string: "https://itunes.apple.com/us/app/facebook/id284882215")!)
}

SOLUTION: I found the solution people. In URL types I had been added fb45....(id of my app), and also added fb, which one shouldn't be there, I removed fb, and only kept the one with id, so the openURL now returns false if the app is not installed

Answer 1

You need to add fb to the LSApplicationQueriesSchemes array in the app plist, not the URL schemes array, like so:

<key>LSApplicationQueriesSchemes</key>
<array>
    <string>fb</string>
</array>